66682005 has 16 divisors (see below), whose sum is σ = 114898560. Its totient is φ = 32827968.

The previous prime is 66681997. The next prime is 66682019. The reversal of 66682005 is 50028666.

It is not a de Polignac number, because 66682005 - 2³ = 66681997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170785 + ... + 171174.

It is an arithmetic number, because the mean of its divisors is an integer number (7181160).

Almost surely, 2^66682005 is an apocalyptic number.

66682005 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66682005 is a deficient number, since it is larger than the sum of its proper divisors (48216555).

66682005 is a wasteful number, since it uses less digits than its factorization.

66682005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341980.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 66682005 is about 8165.9050325117. The cubic root of 66682005 is about 405.5112276009.

The spelling of 66682005 in words is "sixty-six million, six hundred eighty-two thousand, five".